Description
Peterson built this .22 Creedmoor brass as a dedicated case rather than taking shortcuts, and that shows up on the reloading bench. Instead of necking down 6mm or 6.5 Creedmoor brass and dealing with thick neck walls or a doughnut of bunched-up material, you get cases engineered specifically for the .224 bore right out of the box. The .22 Creedmoor itself is a 6.5 Creedmoor necked down to launch long, sleek .224 bullets, and it's earned a reputation as a flat-shooting, wind-bucking round that's genuinely fun to run on prairie dogs, coyotes, and steel way out there.
Why the Small Rifle Primer Peterson .22 Creedmoor Brass Matters
This is the SRP version, meaning a small rifle primer pocket and small flash hole. A lot of precision reloaders prefer the small primer setup for more consistent ignition and tighter velocity spreads, which translates to smaller groups at distance. Peterson designed this brass with increased head hardness to handle the higher pressures the Creedmoor case runs, and they bumped up internal volume slightly to play nicer with the slow-burning powders like H1000 and RL26 that folks favor for this cartridge.
Loading Up Peterson's .22 Creedmoor Casings
Neck wall thickness lands right in the ideal .0143 to .0148 range, trim-to length runs around 1.91 inches, and the brass arrives properly annealed at the neck and shoulder. Peterson worked with Horizon Firearms on the particulars of the case, and the company has chambered guns in this caliber since the wildcat days. You're getting American-made, small-batch brass with the kind of wall thickness and primer pocket consistency that holds up through multiple firings when you take care of it.
Whether you're chasing varmints at long range, shooting PRS-style matches, or just enjoy tuning a flat-shooting .22 centerfire, this is a strong foundation to build your load around. Each piece ships unprimed and ready for your prep routine.
Key Specifications
- Manufacturer: Peterson Cartridge
- Manufacturer Part Number: 40025-R
- UPC: 850005375852
- Caliber: .22 Creedmoor
- Primer Size: Small Rifle (SRP)
- Primed: No (Unprimed)
- Case Material: Brass
- Quantity Per Box: 50
- Bullet Diameter: .224 in
- Trim-To Length: 1.91 in (approx.)
- Country of Origin: Made in USA
- Finish: Annealed neck and shoulder
What’s Included
- 50 count box of unprimed .22 Creedmoor small rifle primer brass
- Peterson flip-top plastic ammo box
Frequently Asked Questions
Is this Peterson .22 Creedmoor brass primed or unprimed?
It ships unprimed, so you'll size, prep, and seat your own small rifle primers before loading. Since this is the SRP version, make sure you're stocking small rifle primers rather than large. That's it, no fireforming required to get started.
What's the advantage of the small rifle primer version over large primer?
The small rifle primer pocket and smaller flash hole tend to give more consistent ignition and tighter velocity spreads, which many precision reloaders feel helps at long range. Some also find small primer pockets hold up better over repeated firings with high-pressure loads. For a cartridge built around accuracy like the .22 Creedmoor, the SRP setup is a popular choice.
Why buy Peterson brass instead of necking down 6.5 or 6mm Creedmoor cases?
When you neck down a larger case, excess brass bunches in the neck and can create a thick spot that hurts bullet release and accuracy. Peterson makes this as a purpose-built .22 Creedmoor case with neck walls already in the ideal range, so you skip that extra prep headache. The brass also comes properly annealed from the factory rather than work-hardened from reforming.
What bullets and powders work well with this .22 Creedmoor brass?
The .22 Creedmoor shines with heavier, high-BC .224 bullets in the 75 to 90 grain range run through a fast twist barrel, typically 1:8 or faster. Slow-burning powders like H4350, H1000, and RL26 are common favorites, and Peterson slightly increased internal volume to work with those. Always start low and work your load up safely using current published data.




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